PthreadCondition.h

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//=============================================================================
//  PthreadCondition and PthreadConditionProtected classes
//-----------------------------------------------------------------------------
//  POSIX Pthread class library
//  Copyright (C) 1997-1999  The University of Texas
//
//  This library is free software; you can redistribute it and/or modify it
//  under the terms of the GNU Library General Public License as published
//  by the Free Software Foundation; either version 2 of the License, or
//  (at your option) any later version.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//  Library General Public License for more details.
//
//  The GNU Public License is available in the file LICENSE, or you
//  can write to the Free Software Foundation, Inc., 59 Temple Place -
//  Suite 330, Boston, MA 02111-1307, USA, or you can find it on the
//  World Wide Web at http://www.fsf.org.
//=============================================================================


#ifndef PthreadCondition_h
#define PthreadCondition_h
#pragma once

#ifdef EXTERNAL_TEMPLATES
#     pragma interface
#endif

#include <cpn/common.h>
#include <cpn/threading/PthreadDefs.h>
#ifdef _POSIX_THREADS

#include <cpn/threading/PthreadErrorHandler.h>
#include <cpn/threading/PthreadMutex.h>
#include <cpn/threading/PthreadConditionAttr.h>

class PthreadCondition : public PthreadErrorHandler {
  public:

    PthreadCondition(void);
    PthreadCondition(const PthreadConditionAttr& condattr);
   ~PthreadCondition(void);

    inline  operator pthread_cond_t* (void) { return &theCond; }

    PthreadCondition&   Signal(void);
    PthreadCondition&   Broadcast(void);
    PthreadCondition&   Wait(PthreadMutex& mutex);
    
    // BEWARE!  abstime is the time in the future to wake up, not the interval
    // i.e.  usleep(100) is equivalent to:   struct timespec ts;
    //       clock_gettime(CLOCK_REALTIME, &ts); ts.tv_nsec += 100000;
    int TimedWait(PthreadMutex& mutex, const timespec* abstime);
    int TimedWait(PthreadMutex& mutex, double reltime);

  private:
    pthread_cond_t      theCond;
};


#endif
#endif